Dan Poltawski authored Mar 18, 2015 and Eloy Lafuente committed Mar 19, 2015

This reverts commit 94d0be78, reversing
changes made to f51ef4d1.

Dan Poltawski authored Mar 18, 2015 and Eloy Lafuente committed Mar 19, 2015

This reverts commit feb8ca8c72dcf429d3c06df6587b57221ae615f4.

Further improvements to this code, including resolving edge cases:

* The new feature can only be used when it is possible for the
previous question in the quiz to be complete.

* Also, this new feature cannot be used in combination with shuffle
questions, because that make no sense; nor in combination with
sequential navigation, because to make that work properly would be a lot
of effort. If someone needs that to work later, it should be possible
for them to implement it.

* There were changes in the edit renderer API, to try to make things
more  consistent, and to make it less likely we will need to change
things again in the future. See mod/quiz/upgrade.txt.

* As part of this change, the styling of the Edit quiz page was tweaked
to make slighly more efficient use of the horizontal space, and to be
more symmetrical.

Eugene Venter authored Mar 03, 2015 and Eloy Lafuente committed Mar 17, 2015

Before this patch course completion only was restored if, appart from
other conditions... we were restoring to new course, never to existing
one.

This relaxes a bit that condition in order to be able to restore to an
existing course not having any course completion setting defined, so no
conflict will happen ever.

Mike Grant authored Mar 10, 2015 and Eloy Lafuente committed Mar 16, 2015

Both $CFG->logsql and $CFG->dblogerror had no use in moodle core
since ages ago (just the former had one use for nothing). Good time
to get rid of both as they are 100% misleading.